1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5986c5a1894da6fddd28b073e8c58b679a60bbc9721ddc2bb361f89bdbb4b069. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a5d9bb5-907c-45fa-bc57-f989e7d8e61a.json and https://artists.proofprofile.net/proofs/artist/5a5d9bb5-907c-45fa-bc57-f989e7d8e61a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71b7815432b4f7301c58937d037d13d7fb2f1143b5824ec27dae1d0c3a0e9bc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:53:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZUM71100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350adb2b20f62f4d9cadf3d49b6c737ca38d3c56399f64c48d39cf58ef21936c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2ed0e1b9adc83dbad5a13074140b9a3e187bdadde7a9bc60eaf85e07de38f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5130bdc2ed5491450907dec404a79bda69842e2d8d2d3547d417ebe57bee05. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b50bf7f0b8da392becd651130e65ee8b7acc31e3ac5b014fa9ca8059ee99606. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727feb61467ea9bcd05b1b234106c6145d25729eabbf89a1b6511e20ff27a9b0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:26:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd964a867dc32da1fbfb75ddd0adbcf1b68fc98f630755d3b484975c3bce3be00. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1577d4409d683e8bbca57f30f728e4dba6a4d104b7f88fb1213a40a0a17547. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101600004.
Láska Se Nám Může Stát (feat. Václav Noid Bárta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fd03b540c7986eba0e9fbd16354aab1b9b4a052d1924837e4753d7d5692519. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe865d43b4e45eeabd04b1d947a777c1f8404b37f1cb17332ee3aa9ae85965894. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8361da09037cb288e5b65d23c689eb5deebb86b47af2aa9213e19d1fa229f483. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c977c362af093a50874b0e84a8f109cfa0a874061f026745171957d2c87f2a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c22d067f97300a1081194471fe3afa49626b8e8a9ff87d461077b625cdf797. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:23:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6751ea5100ea2bef88eba6234403e17e61ab5bbee0d4bd5e44616ed8e5baa6f7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6b17f652216cd888bc939de81d013676675177bff87df41721874bb79529f5. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a400d77a992ca36b812e6c2f1f687da60d15eb73808994db9e1f6dc90f280ff. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5836d67a0103a245527a6e74037c3ec0cd31b72258ba6ce8771957ebad514a21. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42d80dcbcd67871bb18fc86a9051f8fd54f88f21918e2ff71de8bc1aebd53ed. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da4afc7ae6cde0be310d553227e67a7c946961dda92702808363bac3d147de6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6acc5005be9ba1b00e4ea3e71441b32a85a208915fe7ffe26415c242a486019. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adc9b7c0dabaa1614a639b2074293ce08bae2ab88d3206f42a766cefd136dd9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d63bd7793b49436bfaf41b08fe6027b8d8ce4ffa8a14075767edbb63a4bec. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c0f11f59d70d6ee277b6f15ef6b2c9c37496ad4b06488b51c781c51e06af41. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6b5571d2cefe8572aa456ed5e46a0990c2f7c7a40e2d46e4a0e416b29c0084. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK102500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b8c90914e1fca8f89eb1319c9d64c04387a105f40c0b6c57e1c0fc10fa4612. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA541113603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5125294eb20ccb7115730ce60e0b4483d28cc0a7d89bc59cce6b3ac5f417fc22. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA541629807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fb2ccdf49b92598d04f98a590973360f0a912365a8a23ee98beedcdb9a69f0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZZR42000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fb2ccdf49b92598d04f98a590973360f0a912365a8a23ee98beedcdb9a69f0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZZR42000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cdd3855a782070991d383da4e6913feadc5b5374ee54dd6ef5454f3ad36873. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZK101900022.
Navěky spálil´s mou tvář (feat. Olga Lounová)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13381c3fb25f576ac3f35bca1cf032039e0d86207538ec4c3c42ac29b80778b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA232000633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd6b8f6f0596c669fe6057809b311f103cd2fb68f7d732f7383822e1dd5a0f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH682400060.